The name Keira is a girl's name of Irish origin meaning "little dark one". Keira is ranked #331 on our popularity charts and is often added to lists like Girl Baby Names Moving Up Fast and discussed in our forums with posts like "Sextuplets game - girls".
From the experts:
Keira is an attractive girls’ name that's gotten a huge boost from the meteoric rise of Keira Knightley. Original spelling Kiera, which relates more directly to the male Kieran, was the more popular form until the rise of Keira Knightley reversed the order. Both are Anglicized versions of the Irish Ciara.